<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>
      <el-row>
        <el-table :data="rolesList" border stripe>
          <el-table-column type="expand">
            <template slot-scope="scope">
              <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                <!-- 一级权限 -->
                <el-col :span="5">
                  <el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <!-- 二级 & 三级权限 -->
                <el-col :span="19">
                  <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                    <!-- 二级权限 -->
                    <el-col :span="6">
                      <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{ item2.authName }}</el-tag>
                      <i class="el-icon-caret-right"></i>
                    </el-col>
                    <!-- 三级权限 -->
                    <el-col :span="18">
                      <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">{{ item3.authName }}</el-tag>
                    </el-col>
                  </el-row>
                </el-col>
              </el-row>
              <!-- <pre>{{ scope.row }}</pre> -->
            </template>
          </el-table-column>
          <el-table-column type="index"></el-table-column>
          <el-table-column label="角色名称" prop="roleName"></el-table-column>
          <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
          <el-table-column label="操作" width="300px">
            <template slot-scope="scope">
              <el-button @click="showRoleInfo(scope.row.id)" size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
              <el-button @click="removeRoleById(scope.row.id)" size="mini" type="danger" icon="el-icon-delete">删除</el-button>
              <el-button size="mini" type="warning" icon="el-icon-setting" @click="setRightDialog(scope.row)">分配权限</el-button>
            </template>
          </el-table-column>
        </el-table>
      </el-row>
    </el-card>

    <!-- 编辑角色对话框 -->
    <el-dialog title="编辑角色" :visible.sync="editDialogVisible" width="50%" @close="editRoleClosed" :show-close="false" :close-on-click-modal="false">
      <el-form :model="editForm" :rules="formRules" ref="editFormRef" label-width="80px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoleInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 添加角色对话框 -->
    <el-dialog title="添加用户" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
      <!-- 内容主体区域 -->
      <el-form :model="addForm" :rules="formRules" ref="addFormRef" label-width="80px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配权限对话框 -->
    <el-dialog title="添加用户" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree ref="treeRef" :data="rightsList" :props="treeProps" node-key="id" show-checkbox default-expand-all :default-checked-keys="defKeys"></el-tree>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色列表数据
      rolesList: [],
      // 所有权限数据
      rightsList: [],
      // 查询到的角色信息
      editForm: {},
      // 控制编辑弹框是否可见
      editDialogVisible: false,
      // 控制编辑弹框是否可见
      addDialogVisible: false,
      // 控制权限分配对话框是否可见
      setRightDialogVisible: false,
      // 添加角色的对话框数据
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      // 编辑/添加角色对话框字段验证规则
      formRules: {
        roleName: [{ required: true, message: '角色名不能为空', trigger: 'blur' }]
      },
      // 树形组件的配置
      treeProps: {
        children: 'children',
        label: 'authName'
      },
      // 默认选中的节点id值
      defKeys: [],
      // 当前即将分配权限角色的id
      roleId: ''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) return this.$message.error('获取角色列表失败')
      this.rolesList = res.data
      console.log(this.rolesList)
    },
    // 根据id删除角色权限
    async removeRightById(role, rightId) {
      // 提示确认删除
      const confirmResult = await this.$confirm('此操作将永久删除该权限，是否继续？', '提示', {
        confirmButtonText: '删除',
        // showClose: false,
        // closeOnClickModal: false,
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') return this.$message.info('已取消删除操作')
      // 用户已确认删除
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) return this.$message.error('删除权限失败')
      role.children = res.data
    },
    // 根据id删除角色
    async removeRoleById(id) {
      // 提示确认删除
      const confirmResult = await this.$confirm('此操作将永久删除该角色，是否继续？', '提示', {
        confirmButtonText: '删除',
        showClose: false,
        closeOnClickModal: false,
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') return this.$message.info('已取消删除操作')
      // 用户已确认删除
      const { data: res } = await this.$http.delete(`roles/${id}`)
      if (res.meta.status !== 200) return this.$message.error('删除角色失败')
      // 重新渲染列表
      this.getRolesList()
    },
    // 根据id查询角色
    async showRoleInfo(id) {
      const { data: res } = await this.$http.get(`roles/${id}`)
      if (res.meta.status !== 200) return this.$message.error('查询角色失败')
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 编辑角色信息并提交
    editRoleInfo() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        // 表单验证通过，可以发起网络请求
        const { data: res } = await this.$http.put(`roles/${this.editForm.roleId}`, {
          roleName: this.editForm.roleName,
          roleDesc: this.editForm.roleDesc
        })
        if (res.meta.status !== 200) return this.$message.error('编辑角色信息失败')
        // 关闭对话框
        this.editDialogVisible = false
        // 刷新数据列表
        this.getRolesList()
        // 提示修改成功
        this.$message.success('更新角色信息成功')
      })
    },
    // 关闭编辑角色对话框
    editRoleClosed() {
      this.$refs.editFormRef.resetFields()
      this.editForm = {}
    },
    // 发送添加角色请求
    addRole() {
      this.$refs.addFormRef.validate(async valid => {
        console.log(valid)
        if (!valid) return
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) return this.$message.error('添加角色失败')
        this.$message.success('添加角色成功')
        this.addDialogVisible = false
        // 重新获取角色列表
        this.getRolesList()
      })
    },
    // 关闭添加角色对话框
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
      this.addForm = {}
    },
    // 分配角色权限
    async setRightDialog(role) {
      // 获取当前所操作的角色的id，供后面"分配权限"使用
      this.roleId = role.id
      // 获取所有权限
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) return this.$message.error('获取权限数据失败')
      // 把获取到的权限数据保存到data中
      this.rightsList = res.data
      console.log(this.rightsList)
      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 提交角色权限修改
    async allotRights(roleId) {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')

      const {data: res} = await this.$http.post(`roles/${this.roleId}/rights`, {
        rids: idStr
      })
      if(res.meta.status !== 200) return this.$message.error('分配权限失败')
      this.$message.success('分配权限成功')
      // 重新刷新角色列表
      this.getRolesList()
      // 结束操作后隐藏对话框
      this.setRightDialogVisible = false
    },
    // 分配角色对话框关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 递归筛选所有三级权限 id, 并将其保存到数组 this.defKeys 中
    getLeafKeys(node, arr) {
        // 如果当前节点中不包含children属性则说明当前节点是叶子节点（三级节点）
        if(!node.children) return arr.push(node.id)
        node.children.forEach(item => this.getLeafKeys(item, arr))
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>